I'd really like to have access to the testing sandbox that they mentioned in the recent update. An in-game way for it to make some sense could be a shooting range in the Tower or it's own area. Give us a few lanes to shoot down and have them marked as regular, major, ultra, and guardian and let us have a few range options like point blank, close, medium, far, and "only sniper rifles make sense here.". It would make it easier for us to dial in our weapon choices exactly where we want them and help us gauge the distances we want to be fighting at with our gear of choice. You could even throw in a scoreboard so that if we go in as a fireteam we can compete with each other. I also bet Cayde-6 would be a little happier being stationed there and we all need more Nathan Fillion in our lives.